At the critical point \( X=T=0\)  we have found the following double set of masses squared for the canonical scalar fields Our masses differ from the the ones in [1]} by a factor of 1/2.
\(m^2_{\pm } = - {1\over 2} \tilde{f}^2 \left[( \tilde{\gamma }+ 4 \tilde{\zeta }) \pm \sqrt{ {16\tilde{g}^2\over \tilde{f}^2} + (\tilde{\gamma }- 4 \tilde{\zeta })^2} \right]\ .\) 
